Underwater tension meter

Abstract

The underwater tension meter comprises a shell and a tension sensor, the two ends of the shell are open, the tension sensor penetrates through the shell, the two ends of the tension sensor are each provided with two sealing grooves, and the two sealing grooves comprise the outer sealing groove and the inner sealing groove. Sealing rings matched with the inner wall of the shell are accommodated in the outer sealing groove and the inner sealing groove; the underwater tension meter further comprises a left end cover and a right end cover, the left end cover and the right end cover are connected with the tension sensor in a fastening mode through the threads, and the left end cover and the right end cover are tightly attached to the two ends of the shell. According to the underwater tension meter, a sealing scheme of thread sealing and double-layer sealing rings is adopted, so that the sealing performance and the safety are improved, and the working stability requirement of the underwater tension meter in deep water for a long time is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to underwater detection technical field, specifically, relate to a kind of underwater tension meter. BACKGROUND

[0002] Tension meter is a widely used measuring component, which can be found in various industries in society. Since tension meter is used underwater, it needs to be sealed. Most underwater tension meters on the market can only be used in shallow water or cannot work for a long time in deep water. With the progress of science and technology, underwater tension meters need to be used in harsh working conditions, which requires higher corrosion resistance and sealing performance of underwater tension meters, and maintains high measurement accuracy.

[0003] The existing underwater tension meter has the following problems: (1) insufficient pressure resistance. Due to the high pressure of underwater environment, especially in deep water area, the existing tension meter may not be able to withstand high water pressure, resulting in sensor damage or inaccurate readings. (2) Poor corrosion resistance: salt and other chemicals in seawater can easily corrode the shell and connecting parts of the tension meter, reducing its service life. (3) Unstable data transmission: in underwater environment, wireless signal transmission is easily disturbed, and wired transmission may have problems due to cable wear, affecting the accuracy and real-time performance of data.

[0004] The prior art CN209247218U discloses a tension meter for measuring underwater traction force, which comprises a test rod, a first fixed plate, a second fixed plate and a strain gauge; the first fixed plate and the second fixed plate are arranged in parallel; the first fixed plate is provided with a first fixed strip at one end; the second fixed plate is provided with a second fixed strip corresponding to the first fixed strip at one end; the first fixed plate and the first fixed strip are provided with symmetrical first fixing devices therebetween; the first fixed plate and the first fixed strip are fixed to the test rod through the first fixing devices; the second fixed plate and the second fixed strip are provided with symmetrical second fixing devices therebetween; the second fixed plate and the second fixed strip are fixed to the test rod through the second fixing devices; the strain gauge is fixed between the first fixed plate and the second fixed plate; a micro-strain elastic module is arranged on the strain gauge.

[0005] The prior art CN215639864U discloses an underwater sealing and pressure compensation device, which comprises an outer shell having a sealed inner cavity inside; a through hole is provided at the bottom of the outer shell opposite to the sensor mounting surface; it further comprises a force transmission rod, the force transmission rod is sealed through the through hole, and the upper end of the force transmission rod is located in the sealed inner cavity and is used for fixed connection with the detection end of the tension sensor; the lower end of the force transmission rod is located outside the outer shell and constitutes a force measurement connection end; it further comprises a diaphragm sealing structure arranged outside the outer shell, and the gap between the force transmission rod and the through hole is sealed by the diaphragm sealing structure.

[0006] In order to solve the above problems, it is necessary to improve the structure of the existing underwater tension meter, so as to enhance the sealing performance and corrosion resistance of the underwater tension meter and meet the requirements of deep water use.

[0007] In view of the above technical problems, the utility model is provided. SUMMARY

[0008] The main purpose of the utility model is to provide an underwater tension meter, which can be stably used in deep water and deep sea.

[0009] In order to achieve the above purpose, the utility model provides an underwater tension meter, which comprises a shell and a tension sensor, both ends of the shell are open, the tension sensor passes through the shell, both ends of the tension sensor are provided with two sealing grooves, the two sealing grooves comprise an outer sealing groove and an inner sealing groove, and a sealing ring matched with the inner wall of the shell is contained in the outer sealing groove and the inner sealing groove.

[0010] Both ends of the tension sensor are also provided with threads, the threads are located outside the outer sealing groove, the underwater tension meter further comprises a left end cover and a right end cover, the left end cover and the right end cover are fastened to the tension sensor through the threads and tightly adhere to both end portions of the shell.

[0011] Further, the tension sensor comprises a strain gauge module located between the two inner sealing grooves, the two sealing rings in the two inner sealing grooves are isolated to form a sealed cabin in the shell, and the strain gauge module is contained in the sealed cabin.

[0012] Further, the sealing ring adopts an O-shaped Gleason ring.

[0013] Further, the sealed cabin contains insulating oil, the shell is provided with a one-way oil inlet and a one-way oil outlet, and the one-way oil inlet and the one-way oil outlet are in communication with the sealed cabin.

[0014] Further, the thread adopts a G thread.

[0015] Further, the underwater tension meter further comprises locking screws, the shell is provided with screw holes, and the locking screws are pressed on the tension sensor through the screw holes.

[0016] Further, the locking screws are provided in plurality, the plurality of locking screws are located between the outer sealing groove and the thread and are distributed in the circumferential direction of the tension sensor.

[0017] Further, the shell is further provided with a waterproof joint, and the waterproof joint is connected with the tension sensor through the shell.

[0018] Further, the waterproof joint is provided with a wire protection sleeve on the outside, and the waterproof sealant is contained in the wire protection sleeve.

[0019] Further, the two ends of the tension sensor are further connected with tension arms.

[0020] The technical scheme of the utility model at least realizes the following beneficial effects:

[0021] 1. The underwater tension meter of the application combines the sealing schemes of thread sealing and double-layer sealing ring sealing, greatly improves the sealing performance and safety of the tension meter, and meets the working stability requirements of the underwater tension meter in deep water for a long time.

[0022] 2. The underwater tension meter of the application further designs a sealing cabin and injects insulating oil into the sealing cabin, the liquid medium in the sealing cabin can effectively offset the pressure generated by external leakage, can effectively prevent the sealing ring from leaking a small amount of water due to long-term friction and water pressure, and can prevent the strain gauge module from being eroded and damaged after water vapor enters, and the small amount of volatile oil molecules also play an oil film lubricating effect on the outer sealing ring nearby, increasing the service life thereof.

[0023] 3. The underwater tension meter of the application adopts G thread, which has reliable thread sealing, uniform sealing surface pressure, strong pressure resistance, and convenient disassembly.

[0024] 4. The underwater tension meter of the application locks and fixes the tension sensor by the locking screw, prevents the tension sensor from rotating, and injects the waterproof sealant into the wire protection sleeve to avoid the loosening of the signal cable affecting the sealing effect of the waterproof joint. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings accompanying the specification of the utility model form a part of the utility model and serve to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0026] Figure 1 The underwater tension meter of the application is shown in the cross-sectional view.

[0027] Among them, the above drawings include the following reference signs:

[0028] 1, left end cover; 2, shell; 3, wire protection sleeve; 4, waterproof joint; 5, right end cover; 6, sealing ring; 7, tension sensor; 8, locking screw; 9, sealing cabin; 10, tension arm. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other in the case of no conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] The utility model will be described in detail below in combination with specific embodiments, and these embodiments cannot be understood as limiting the scope of the utility model claimed. The term "comprising" indicates the presence of a feature when used, but does not exclude the presence or addition of one or more other features; the directions or position relationships indicated by the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the utility model; in addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] In the description, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, in the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0032] Embodiment:

[0033] The utility model proposes a kind of underwater tension meter, as shown in figure Figure 1 Two ends of shell 2 are open, and tension sensor 7 passes through shell 2. Two ends of tension sensor 7 are each provided with two sealing grooves, and the two sealing grooves include outer sealing groove and inner sealing groove, and the outer sealing groove is located at the outer side of inner sealing groove and is spaced distribution. Sealing ring 6 that cooperates with the inner wall of shell 2 is accommodated in outer sealing groove and inner sealing groove. Two ends of tension sensor 7 are also fixedly connected with tension arm 10.

[0034] Two ends of tension sensor 7 are also respectively provided with thread, and the thread is located at the outer side of outer sealing groove, underwater tension meter also includes left end cover 1 and right end cover 5, and left end cover 1 and right end cover 5 are fixedly connected with tension sensor 7 by thread, and are tightly attached to the two end portions of shell 2.

[0035] The underwater tension gauge of the present application combines the sealing scheme of thread sealing and double sealing ring sealing, greatly improves the sealing property and safety of the tension gauge, and meets the working stability requirement of the underwater tension gauge in deep water for a long time.

[0036] The tension sensor 7 comprises a strain gauge module between two inner sealing grooves, two sealing rings 6 in the two inner sealing grooves are isolated to form a sealed cabin 9 in the shell 2, and the strain gauge module is contained in the sealed cabin 9.

[0037] Preferably, the sealing ring 6 adopts an O-shaped hole Glauber ring. Further preferably, the O-shaped ring material adopts fluorine rubber.

[0038] Further, the sealed cabin 9 contains insulating oil, the shell 2 is provided with a one-way oil inlet and a one-way oil outlet, and the one-way oil inlet and the one-way oil outlet are in communication with the sealed cabin 9. After a certain amount of insulating oil is injected from the one-way oil inlet, the oil overflow is observed at the one-way oil outlet, at which time it can be considered that the sealed cabin is filled with insulating oil.

[0039] The liquid medium in the sealed cabin can effectively offset the pressure generated by external leakage, can effectively prevent the sealing ring from causing a small amount of water leakage due to long-term friction and the action of water pressure, and can prevent water vapor from entering and causing erosion and damage to the strain gauge module. The small amount of volatile oil molecules also play an oil film lubrication role on the nearby outer sealing ring, increasing its service life.

[0040] Preferably, the thread adopts G thread. This kind of thread sealing is reliable, the sealing surface pressure is uniform, the pressure resistance is strong, and the disassembly is convenient.

[0041] Further, the underwater tension gauge further comprises a locking screw 8, the shell 2 is provided with a screw hole, and the locking screw 8 is pressed on the tension sensor 7 through the screw hole.

[0042] In addition, the locking screw 8 has a plurality of locking screws 8, and the plurality of locking screws 8 are located between the outer sealing groove and the thread and are distributed around the circumference of the tension sensor 7. By setting the locking screw, the tension sensor is locked and fixed, preventing the tension sensor from rotating,

[0043] Further, the shell 2 is further provided with a waterproof joint 4, and the waterproof joint 4 is connected with the tension sensor 7 through the shell 2. The outer side of the waterproof joint 4 is provided with a wire sleeve 3, and the wire sleeve 3 contains waterproof sealing glue. The waterproof joint 4 is used for signal cable transmission, and after the signal cable is installed, the waterproof sealing glue is injected into the wire sleeve 3, so as to avoid the loosening of the signal cable affecting the sealing effect of the waterproof joint 4.

[0044] The assembling process of the underwater tension gauge is as follows: two O-rings are respectively arranged in the two end sealing grooves of the tension sensor 7 in advance, then the tension sensor 7 is arranged in the shell 2, the tension sensor 7 is locked and fixed through the locking screw 8, and finally the left end cover 1 and the right end cover 5 are respectively sealed through the threaded cooperation of the two ends of the tension sensor 7.

[0045] For the corrosion resistance of the tension gauge, 14-4 and 304L materials are mainly used in the market, considering that the tension gauge is used in deep sea areas above 15 meters for a long time and requires reliable corrosion resistance, and in view of the sealing property, the main material of the tension gauge is changed to reliable 2205 duplex stainless steel, in the application, the shell 2, the left end cover 1, the right end cover 5, the waterproof joint 4 and the wire sleeve 3 are made of 2205 duplex stainless steel.

[0046] Compared with 304 stainless steel, 2205 duplex stainless steel has more stable performance to adapt to deep sea operation, and the duplex 2205 stainless steel plate has the following characteristics compared with the austenitic 304 stainless steel plate:

[0047] 1. The yield strength is more than twice that of ordinary austenitic stainless steel, and it has the required forming.

[0048] 2. Sufficient plasticity and toughness are conducive to reducing costs.

[0049] 3. It has excellent stress corrosion cracking resistance.

[0050] 4. It has good local corrosion resistance, and compared with austenitic stainless steel with similar alloy content, it is superior to austenitic stainless steel in terms of wear corrosion resistance and fatigue corrosion resistance.

[0051] 5. It has higher energy absorption capacity under dynamic or static load conditions, which is of great practical value for structural parts to deal with sudden accidents such as collision.

[0052] In summary, from the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0053] 1. The underwater tension gauge of the application combines the sealing scheme of threaded sealing and double sealing ring sealing, greatly improves the sealing property and safety of the tension gauge, and meets the working stability requirements of the underwater tension gauge in deep water for a long time.

[0054] 2、The underwater tension meter of the application can effectively prevent the sealing ring from leaking a small amount of water due to long-term friction and water pressure, and can effectively prevent the water vapor from eroding and damaging the strain gauge module after entering, and the small amount of volatile oil molecules can also play an oil film lubricating effect on the outer sealing ring, thereby increasing the service life of the outer sealing ring.

[0055] 3、The underwater tension meter of the application adopts G thread, which is reliable in sealing, uniform in sealing surface pressure, strong in pressure resistance, and convenient to disassemble.

[0056] 4、The underwater tension meter of the application locks and fixes the tension sensor by setting a locking screw, so as to prevent the tension sensor from rotating, and injects waterproof sealing glue in the wire sleeve, so as to avoid the loosening of the signal cable from affecting the sealing effect of the waterproof connector.

[0057] The above only describes preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An underwater tension gauge comprising a housing (2) open at both ends and a tension sensor (7) passing through the housing (2), characterised in that, Both ends of the tension sensor (7) are provided with two sealing grooves, including an outer sealing groove and an inner sealing groove, and the outer sealing groove and the inner sealing groove are provided with sealing rings (6) matched with the inner wall of the shell (2); Both ends of the tension sensor (7) are also provided with threads, which are located outside the outer sealing groove, and the underwater tension meter also includes a left end cover (1) and a right end cover (5), both of which are fastened to the tension sensor (7) through the threads and tightly contact the two ends of the shell (2).

2. The underwater tension gauge of claim 1, wherein: The tension sensor (7) includes a strain gauge module between the two inner sealing grooves, and the two sealing rings (6) in the two inner sealing grooves isolate a sealed cabin (9) in the shell (2), and the strain gauge module is contained in the sealed cabin (9).

3. The underwater tension gauge of claim 2, wherein: The sealing ring (6) adopts an O-shaped Gore ring.

4. The underwater tension gauge of claim 2, wherein: The sealed cabin (9) contains insulating oil, and the shell (2) is provided with a one-way oil inlet and a one-way oil outlet, both of which are in communication with the sealed cabin (9).

5. The underwater tension gauge of claim 1, wherein: The thread adopts G thread.

6. The underwater tension gauge of claim 1, wherein: The underwater tension meter also includes locking screws (8), and the shell (2) is provided with screw holes, and the locking screws (8) are pressed on the tension sensor (7) through the screw holes.

7. The underwater tension meter of claim 6, wherein: The locking screw (8) has a plurality of locking screws (8) located between the outer sealing groove and the thread and distributed around the circumference of the tension sensor (7).

8. The underwater tension gauge of claim 1, wherein: The shell (2) is also provided with a waterproof joint (4), which is connected with the tension sensor (7) through the shell (2).

9. The underwater tension gauge of claim 8, wherein: The outer side of the waterproof joint (4) is provided with a wire protection sleeve (3), and the wire protection sleeve (3) contains waterproof sealant.

10. The underwater tension gauge of claim 1, wherein: Both ends of the tension sensor (7) are also connected with tension arms (10).

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